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✦ Developer Tool
FREE BASE64 ENCODER DECODER
Encode and decode Base64 strings instantly. Supports text and URLs. Free online Base64 encoder decoder — no signup, no limits.
Encode to Base64
Decode from Base64
Invalid Base64 string.
What is Base64?
Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters (A-Z, a-z, 0-9, + and /). It is widely used in web development, email systems and data transfer protocols.
Common Base64 Use Cases
- Embed images in HTML/CSS — data:image/png;base64,...
- API authentication — HTTP Basic Auth uses Base64 for credentials
- Email attachments — MIME encoding uses Base64
- JWT tokens — JSON Web Tokens use Base64URL encoding
Frequently Asked Questions
What is Base64 encoding?+
Base64 converts binary data into ASCII text using 64 printable characters. It is used to safely transmit binary data in text-based systems like email and URLs.
When do I need Base64?+
Common uses include encoding images for embedding in HTML/CSS, encoding authentication credentials, and encoding data for APIs.
Does it support file encoding?+
This tool encodes text. For file encoding use a dedicated tool.
Is decoding secure?+
Base64 is encoding, not encryption. Anyone can decode Base64 — it provides no security.
Is it free?+
Yes, 100% free with no signup required.